REAL ANALYSIS 2 - Spring 2017

Henri Lebesgue, 1875-1941

Stefan Banach, 1892-1945

David Hilbert, 1862-1943

The spring 2017 Real Analysis 2 class

COURSE: MATH 5220-001

TIME: 2:15-3:35 TR, PLACE: Sam Wilson, Room 209

INSTRUCTOR: Dr. Robert Gardner, OFFICE: Room 308F of Gilbreath Hall

OFFICE HOURS: TR after class PHONE: 439-6979 (Math Office 439-4349)

E-MAIL: gardnerr@etsu.edu
WEBPAGE: http://faculty.etsu.edu/gardnerr/gardner.htm

TEXT: Real Analysis, Fourth Edition, by H.L. Royden and P.M. Fitzpatrick, Prentice Hall (2010).

CLASS NOTES: We will use projected digital notes for the component of the lecture consisting of definitions, statements of theorems, and some examples. Proofs of the vast majority of theorems, propositions, lemmas, and corollaries are available and in Beamer presentations and will be presented in class as time permits. The white board will be used for marginal notes and additional examples and explanation. Copies of the notes are online at:

It is strongly recommended that you get printed copies of the overheads before the material is covered in class. This will save you from writing down most notes in class and you can concentrate on listening and supplementing the notes with comments which you find relevant. You should read the online notes to be covered in class before each class (we may not have class time to cover every little detail in the online notes). Try to understand the definitions, the examples, and the meanings of the theorems. After each class, you should read the section of the book covered in that class, paying particular attention to examples and proofs.

ABOUT THE COURSE: We will build on the results of Real Analysis 1. We will cover, to some extent, Banach spaces and Hilbert spaces, though these are topics more appropriately covered in a functional analysis class (which will be offered during summer 2017). We may look at topological spaces. Time permitting, I want to cover some of the topics on general measure and integration such as signed measures, product measures, and the Fubini-Tonelli results. The fourth edition of Real Analysis states on page x that "The general theory of measure and integration was born in the early twentieth century. It is now an indispensable ingredient in remarkably diverse areas of mathematics, including probability theory, partial differential equation, functional analysis, harmonic analysis, and dynamical systems. Indeed, it has become a unifying concept."

GRADING: Homework will be assigned on a regular basis (weekly) and your grade on the homework will determine your grade for the course (so there are no tests!). Grades will be assigned based on a 10 point scale with "plus" and "minus" grades being assigned as appropriate (which means, based on how the university assigns grade points, 3 point intervals for plus and minus grades - for example, an A- corresponds to percentage grades of 90, 91, and 92). Remember that the lowest passing grade in a graduate course is a C, so you need an average of 73% on all assignments in order to pass this class.

A NOTE ABOUT HOMEWORK: While I suspect that you may work with each other on the homework problems (in fact, I encourage you to), I expect that the work you turn in is your own and that you understand it. Several of the homework problems are fairly standard for this class, and you may find proofs online. However, the online proofs may not be done with the notation, definitions, and specific methods which we are developing and, therefore, are not acceptable for this class. Your homework grade will also reflect how clearly you write up your solution and document your claims.

TENTATIVE OUTLINE:
3.2. Sequential Pointwise Limits and Simple Approximation.
3.3. Littlewood's Three Principals, Egoroff's Theorem, and Lusin's Theorem.
5.2. Convergence in Measure.
6.6. Convex Functions and Jensen's Inequality.
Chapter 7: The Lp Spaces: Completeness and Approximation.
Lp spaces, Minkowski and Holder Inequalities, convergence and completeness, Banach spaces, Riesz-Fischer Theorem, approximation, and separability.
Chapter 8: The Lp Spaces: Duality and Weak Convergence.
Bounded linear functionals, Riesz Representation Theorem, dual spaces, weak convergence.
Hilbert Spaces.
Hamel and Schauder bases, inner product spaces, completeness, projections, Hilbert spaces Isomorphisms, the Fundamental Theorem of Infinite Dimensional Vector Spaces.
Chapters 11 and 12: Topological Spaces.
Open/closed, continuous, bases, separation axioms, connectedness, compactness, product topology.
Chapters 17 and 18: General Measure.
Signed measure, Caratheodory measure, outer measures, Caratheodory-Hahn Theorem.
Chapter 20: Particular Measures (partial).
Product measures, multiple integrals, theorems of Fubini and Tonelli.

SUPPLEMENTS
  1. The notes for the "Meaning of Mathematics" lecture are also online at: Meaning of Mathematics.
  2. The notes for "Essential Background for Real Analysis I" are online at PDF.
  3. The Riemann-Lebesgue Theorem handout is online at: PDF.
  4. Axiom of Choice handout is online at: PDF and PostScript.
  5. Banach-Tarski Paradox handout is online at: PDF and PostScript.
  6. A handout is available which discusses the inner measure approach to countable additivity: Measure Theory.
  7. To access the Mathematical Reviews: Go to the Sherrod Library online catalog. Click the "Title" tab and enter "Mathematical Reviews." Select "MathSciNet [Electronic Resource]" and follow the links. You will be asked to enter your user ID and password (the same you use for your ETSU e-mail). You are then redirected to MathSciNet and can freely use it and even download PDF versions of some of the papers you find! Of course, this protocol will work for any electronic journal available through the Sherrod Library.

What's the Weather Like on Campus?

Since there is the chance that classes might be cancelled due to weather this semester, in the event of bad weather you should monitor local media (Campus Cable TV, WETS FM89.5 radio, and WJHL Channel 11) to see if ETSU is open or closed. A mass notification system is used to provide email and text messages to members of the campus community. So you will get an e-mail to your ETSU account if classes are cancelled. An easier option is to have a text sent to your phone when classes are cancelled. You can sign up for this service at: GoldAlert registration. E-Learning has a webcam pointing at the northwest end of Nick's Hall which you can use to get some idea of the current weather conditions on campus: ETSU NOW. (Not working as of 11/9/2016.)

IMPORTANT DATES: (see http://www.etsu.edu/etsu/academicdates.aspx for the official ETSU calendar; accessed 10/25/2016):

Homework
Section
Problems
Solutions
Due Date
Points
3.2. Sequential Pointwise Limits and Simple Approximation.
12, 14/15, 21
Solutions
Friday, January 20
5 + 5 + 5 = 15
3.3. Littlewood's Three Principals, Egoroff's Theorem, and Lusin's Theorem.
25, 27, 30
Solutions
Friday, January 27
5 + 5 + 5 = 15
5.2. Convergence in Measure.
6.6. Convex Functions.
5.8a, 5.8b
6.67
Solutions
Friday, February 3
5 + 5 + 5 = 15
7.1. Linear Spaces.
7.3, 7.5a, 7.5b
Solutions
Friday, February 10
5 + 5 + 5 = 15
7.2. The Inequalities of Young, Holder, and Minkowski.
7.12(a,b), 7.12(c,d), 7.18
Solutions
Friday, February 17
5 + 5 + 5 = 15
7.3. Lp is Complete: The Riesz-Fischer Theorem.
7.25, 7.26, 7.34ab
Solutions
Friday, February 24
5 + 5 + 5 = 15
7.4. Approximation and Separability.
7.36, 7.39, 7.44
Solutions
Friday, March 3
5 + 5 + 5 = 15
8.1. The Riesz Representation for the Dual of Lp.
8.1, 8.2, 8.7a
Solutions
Tuesday, March 21
5 + 5 + 5 = 15
HWG 5.1. Groups, Fields, Vector Spaces; HWG5.2. Inner Product Spaces.
5.1.3, 5.2.5a, 5.2.5b, 5.2.5c
Solutions
Friday, March 31
5 + 5 + 5 + 5 = 20
HWG 5.4. Projections and Hilbert Space Isomorphisms.
5.4.6, 5.4.8, 5.4.10
Solutions
Friday, April 7
5 + 5 + 5 = 15
17.1. Measures and Measurable Sets.
17.5, 17.7(i), 17.7(ii)
Solutions
Friday, April 14
5 + 5 + 5 + (5) = 15 + (5)
17.2. Signed Measures.
17.13, 17.14, 17.15
Solutions
Friday, April 21
5 + 5 + 5 + (5) = 15 + (5)
17.4. The Construction of Outer Measures.
17.18, 17.19
Solutions
Tuesday, May 2
(10) = (10)
TOTAL
-
-
-
185 + (20)
The numbers in parentheses represent bonus problems.


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Last updated: April 24, 2017.